[ViewVC] Diff of: cvs/EV/EV.pm

Comparing EV/EV.pm (file contents):
Revision 1.50 by root, Sat Nov 24 08:42:38 2007 UTC vs.
Revision 1.115 by root, Tue Apr 28 00:50:56 2009 UTC

…		…
2		2
3	EV - perl interface to libev, a high performance full-featured event loop	3	EV - perl interface to libev, a high performance full-featured event loop
4		4
5	=head1 SYNOPSIS	5	=head1 SYNOPSIS
6		6
7	use EV;	7	use EV;
		8
		9	# TIMERS
		10
		11	my $w = EV::timer 2, 0, sub {
		12	warn "is called after 2s";
		13	};
		14
		15	my $w = EV::timer 2, 2, sub {
		16	warn "is called roughly every 2s (repeat = 2)";
		17	};
		18
		19	undef $w; # destroy event watcher again
		20
		21	my $w = EV::periodic 0, 60, 0, sub {
		22	warn "is called every minute, on the minute, exactly";
		23	};
		24
		25	# IO
		26
		27	my $w = EV::io *STDIN, EV::READ, sub {
		28	my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
		29	warn "stdin is readable, you entered: ", <STDIN>;
		30	};
		31
		32	# SIGNALS
		33
		34	my $w = EV::signal 'QUIT', sub {
		35	warn "sigquit received\n";
		36	};
		37
		38	# CHILD/PID STATUS CHANGES
8		39
9	# TIMERS	40	my $w = EV::child 666, 0, sub {
		41	my ($w, $revents) = @_;
		42	my $status = $w->rstatus;
		43	};
10		44
11	my $w = EV::timer 2, 0, sub {	45	# STAT CHANGES
12	warn "is called after 2s";	46	my $w = EV::stat "/etc/passwd", 10, sub {
13	};
14
15	my $w = EV::timer 2, 2, sub {
16	warn "is called roughly every 2s (repeat = 2)";
17	};
18
19	undef $w; # destroy event watcher again
20
21	my $w = EV::periodic 0, 60, 0, sub {
22	warn "is called every minute, on the minute, exactly";
23	};
24
25	# IO
26
27	my $w = EV::io *STDIN, EV::READ, sub {
28	my ($w, $revents) = @_; # all callbacks receive the watcher and event mask
29	warn "stdin is readable, you entered: ", <STDIN>;
30	};
31
32	# SIGNALS
33
34	my $w = EV::signal 'QUIT', sub {
35	warn "sigquit received\n";
36	};
37
38	# CHILD/PID STATUS CHANGES
39
40	my $w = EV::child 666, sub {
41	my ($w, $revents) = @_;	47	my ($w, $revents) = @_;
42	my $status = $w->rstatus;	48	warn $w->path, " has changed somehow.\n";
43	};	49	};
44		50
45	# MAINLOOP	51	# MAINLOOP
46	EV::loop; # loop until EV::unloop is called or all watchers stop	52	EV::loop; # loop until EV::unloop is called or all watchers stop
47	EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled	53	EV::loop EV::LOOP_ONESHOT; # block until at least one event could be handled
48	EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block	54	EV::loop EV::LOOP_NONBLOCK; # try to handle same events, but do not block
49		55
50	=head1 DESCRIPTION	56	=head1 DESCRIPTION
51		57
52	This module provides an interface to libev	58	This module provides an interface to libev
53	(L<http://software.schmorp.de/pkg/libev.html>).	59	(L<http://software.schmorp.de/pkg/libev.html>). While the documentation
		60	below is comprehensive, one might also consult the documentation of
		61	libev itself (L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod> or
		62	F<perldoc EV::libev>) for more subtle details on watcher semantics or some
		63	discussion on the available backends, or how to force a specific backend
		64	with C<LIBEV_FLAGS>, or just about in any case because it has much more
		65	detailed information.
		66
		67	This module is very fast and scalable. It is actually so fast that you
		68	can use it through the L<AnyEvent> module, stay portable to other event
		69	loops (if you don't rely on any watcher types not available through it)
		70	and still be faster than with any other event loop currently supported in
		71	Perl.
		72
		73	=head2 MODULE EXPORTS
		74
		75	This module does not export any symbols.
54		76
55	=cut	77	=cut
56		78
57	package EV;	79	package EV;
58		80
		81	no warnings;
59	use strict;	82	use strict;
60		83
61	BEGIN {	84	BEGIN {
62	our $VERSION = '1.2';	85	our $VERSION = '3.6';
63	use XSLoader;	86	use XSLoader;
64	XSLoader::load "EV", $VERSION;	87	XSLoader::load "EV", $VERSION;
65	}	88	}
66		89
67	@EV::IO::ISA =	90	@EV::IO::ISA =
68	@EV::Timer::ISA =	91	@EV::Timer::ISA =
69	@EV::Periodic::ISA =	92	@EV::Periodic::ISA =
70	@EV::Signal::ISA =	93	@EV::Signal::ISA =
		94	@EV::Child::ISA =
		95	@EV::Stat::ISA =
71	@EV::Idle::ISA =	96	@EV::Idle::ISA =
72	@EV::Prepare::ISA =	97	@EV::Prepare::ISA =
73	@EV::Check::ISA =	98	@EV::Check::ISA =
74	@EV::Child::ISA = "EV::Watcher";	99	@EV::Embed::ISA =
		100	@EV::Fork::ISA =
		101	@EV::Async::ISA =
		102	"EV::Watcher";
		103
		104	@EV::Loop::Default::ISA = "EV::Loop";
		105
		106	=head1 EVENT LOOPS
		107
		108	EV supports multiple event loops: There is a single "default event loop"
		109	that can handle everything including signals and child watchers, and any
		110	number of "dynamic event loops" that can use different backends (with
		111	various limitations), but no child and signal watchers.
		112
		113	You do not have to do anything to create the default event loop: When
		114	the module is loaded a suitable backend is selected on the premise of
		115	selecting a working backend (which for example rules out kqueue on most
		116	BSDs). Modules should, unless they have "special needs" always use the
		117	default loop as this is fastest (perl-wise), best supported by other
		118	modules (e.g. AnyEvent or Coro) and most portable event loop.
		119
		120	For specific programs you can create additional event loops dynamically.
		121
		122	If you want to take advantage of kqueue (which often works properly for
		123	sockets only) even though the default loop doesn't enable it, you can
		124	I<embed> a kqueue loop into the default loop: running the default loop
		125	will then also service the kqueue loop to some extent. See the example in
		126	the section about embed watchers for an example on how to achieve that.
		127
		128	=over 4
		129
		130	=item $loop = new EV::Loop [$flags]
		131
		132	Create a new event loop as per the specified flags. Please refer to
		133	the C<ev_loop_new ()> function description in the libev documentation
		134	(L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#GLOBAL_FUNCTIONS>,
		135	or locally-installed as F<EV::libev> manpage) for more info.
		136
		137	The loop will automatically be destroyed when it is no longer referenced
		138	by any watcher and the loop object goes out of scope.
		139
		140	If you are not embedding the loop, then Using C<EV::FLAG_FORKCHECK>
		141	is recommended, as only the default event loop is protected by this
		142	module. If you I<are> embedding this loop in the default loop, this is not
		143	necessary, as C<EV::embed> automatically does the right thing on fork.
		144
		145	=item $loop->loop_fork
		146
		147	Must be called after a fork in the child, before entering or continuing
		148	the event loop. An alternative is to use C<EV::FLAG_FORKCHECK> which calls
		149	this function automatically, at some performance loss (refer to the libev
		150	documentation).
		151
		152	=item $loop->loop_verify
		153
		154	Calls C<ev_verify> to make internal consistency checks (for debugging
		155	libev) and abort the program if any data structures were found to be
		156	corrupted.
		157
		158	=item $loop = EV::default_loop [$flags]
		159
		160	Return the default loop (which is a singleton object). Since this module
		161	already creates the default loop with default flags, specifying flags here
		162	will not have any effect unless you destroy the default loop first, which
		163	isn't supported. So in short: don't do it, and if you break it, you get to
		164	keep the pieces.
		165
		166	=back
		167
75		168
76	=head1 BASIC INTERFACE	169	=head1 BASIC INTERFACE
77		170
78	=over 4	171	=over 4
79		172
80	=item $EV::DIED	173	=item $EV::DIED
81		174
82	Must contain a reference to a function that is called when a callback	175	Must contain a reference to a function that is called when a callback
83	throws an exception (with $@ containing thr error). The default prints an	176	throws an exception (with $@ containing the error). The default prints an
84	informative message and continues.	177	informative message and continues.
85		178
86	If this callback throws an exception it will be silently ignored.	179	If this callback throws an exception it will be silently ignored.
87		180
		181	=item $flags = EV::supported_backends
		182
		183	=item $flags = EV::recommended_backends
		184
		185	=item $flags = EV::embeddable_backends
		186
		187	Returns the set (see C<EV::BACKEND_*> flags) of backends supported by this
		188	instance of EV, the set of recommended backends (supposed to be good) for
		189	this platform and the set of embeddable backends (see EMBED WATCHERS).
		190
		191	=item EV::sleep $seconds
		192
		193	Block the process for the given number of (fractional) seconds.
		194
88	=item $time = EV::time	195	=item $time = EV::time
89		196
90	Returns the current time in (fractional) seconds since the epoch.	197	Returns the current time in (fractional) seconds since the epoch.
91		198
92	=item $time = EV::now	199	=item $time = EV::now
93		200
		201	=item $time = $loop->now
		202
94	Returns the time the last event loop iteration has been started. This	203	Returns the time the last event loop iteration has been started. This
95	is the time that (relative) timers are based on, and refering to it is	204	is the time that (relative) timers are based on, and referring to it is
96	usually faster then calling EV::time.	205	usually faster then calling EV::time.
97		206
98	=item $method = EV::method	207	=item EV::now_update
99		208
		209	=item $loop->now_update
		210
		211	Establishes the current time by querying the kernel, updating the time
		212	returned by C<EV::now> in the progress. This is a costly operation and
		213	is usually done automatically within C<EV::loop>.
		214
		215	This function is rarely useful, but when some event callback runs for a
		216	very long time without entering the event loop, updating libev's idea of
		217	the current time is a good idea.
		218
		219	=item EV::suspend
		220
		221	=item $loop->suspend
		222
		223	=item EV::resume
		224
		225	=item $loop->resume
		226
		227	These two functions suspend and resume a loop, for use when the loop is
		228	not used for a while and timeouts should not be processed.
		229
		230	A typical use case would be an interactive program such as a game: When
		231	the user presses C<^Z> to suspend the game and resumes it an hour later it
		232	would be best to handle timeouts as if no time had actually passed while
		233	the program was suspended. This can be achieved by calling C<suspend>
		234	in your C<SIGTSTP> handler, sending yourself a C<SIGSTOP> and calling
		235	C<resume> directly afterwards to resume timer processing.
		236
		237	Effectively, all C<timer> watchers will be delayed by the time spend
		238	between C<suspend> and C<resume>, and all C<periodic> watchers
		239	will be rescheduled (that is, they will lose any events that would have
		240	occured while suspended).
		241
		242	After calling C<suspend> you B<must not> call I<any> function on the given
		243	loop other than C<resume>, and you B<must not> call C<resume>
		244	without a previous call to C<suspend>.
		245
		246	Calling C<suspend>/C<resume> has the side effect of updating the event
		247	loop time (see C<now_update>).
		248
		249	=item $backend = EV::backend
		250
		251	=item $backend = $loop->backend
		252
100	Returns an integer describing the backend used by libev (EV::METHOD_SELECT	253	Returns an integer describing the backend used by libev (EV::BACKEND_SELECT
101	or EV::METHOD_EPOLL).	254	or EV::BACKEND_EPOLL).
102		255
103	=item EV::loop [$flags]	256	=item EV::loop [$flags]
		257
		258	=item $loop->loop ([$flags])
104		259
105	Begin checking for events and calling callbacks. It returns when a	260	Begin checking for events and calling callbacks. It returns when a
106	callback calls EV::unloop.	261	callback calls EV::unloop.
107		262
108	The $flags argument can be one of the following:	263	The $flags argument can be one of the following:
…		…
111	EV::LOOP_ONESHOT block at most once (wait, but do not loop)	266	EV::LOOP_ONESHOT block at most once (wait, but do not loop)
112	EV::LOOP_NONBLOCK do not block at all (fetch/handle events but do not wait)	267	EV::LOOP_NONBLOCK do not block at all (fetch/handle events but do not wait)
113		268
114	=item EV::unloop [$how]	269	=item EV::unloop [$how]
115		270
		271	=item $loop->unloop ([$how])
		272
116	When called with no arguments or an argument of EV::UNLOOP_ONE, makes the	273	When called with no arguments or an argument of EV::UNLOOP_ONE, makes the
117	innermost call to EV::loop return.	274	innermost call to EV::loop return.
118		275
119	When called with an argument of EV::UNLOOP_ALL, all calls to EV::loop will return as	276	When called with an argument of EV::UNLOOP_ALL, all calls to EV::loop will return as
120	fast as possible.	277	fast as possible.
121		278
		279	=item $count = EV::loop_count
		280
		281	=item $count = $loop->loop_count
		282
		283	Return the number of times the event loop has polled for new
		284	events. Sometimes useful as a generation counter.
		285
122	=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents)	286	=item EV::once $fh_or_undef, $events, $timeout, $cb->($revents)
		287
		288	=item $loop->once ($fh_or_undef, $events, $timeout, $cb->($revents))
123		289
124	This function rolls together an I/O and a timer watcher for a single	290	This function rolls together an I/O and a timer watcher for a single
125	one-shot event without the need for managing a watcher object.	291	one-shot event without the need for managing a watcher object.
126		292
127	If C<$fh_or_undef> is a filehandle or file descriptor, then C<$events>	293	If C<$fh_or_undef> is a filehandle or file descriptor, then C<$events>
…		…
133	If timeout is C<undef> or negative, then there will be no	299	If timeout is C<undef> or negative, then there will be no
134	timeout. Otherwise a EV::timer with this value will be started.	300	timeout. Otherwise a EV::timer with this value will be started.
135		301
136	When an error occurs or either the timeout or I/O watcher triggers, then	302	When an error occurs or either the timeout or I/O watcher triggers, then
137	the callback will be called with the received event set (in general	303	the callback will be called with the received event set (in general
138	you can expect it to be a combination of C<EV:ERROR>, C<EV::READ>,	304	you can expect it to be a combination of C<EV::ERROR>, C<EV::READ>,
139	C<EV::WRITE> and C<EV::TIMEOUT>).	305	C<EV::WRITE> and C<EV::TIMEOUT>).
140		306
141	EV::once doesn't return anything: the watchers stay active till either	307	EV::once doesn't return anything: the watchers stay active till either
142	of them triggers, then they will be stopped and freed, and the callback	308	of them triggers, then they will be stopped and freed, and the callback
143	invoked.	309	invoked.
144		310
145	=back	311	=item EV::feed_fd_event ($fd, $revents)
146		312
147	=head2 WATCHER	313	=item $loop->feed_fd_event ($fd, $revents)
		314
		315	Feed an event on a file descriptor into EV. EV will react to this call as
		316	if the readyness notifications specified by C<$revents> (a combination of
		317	C<EV::READ> and C<EV::WRITE>) happened on the file descriptor C<$fd>.
		318
		319	=item EV::feed_signal_event ($signal)
		320
		321	Feed a signal event into EV. EV will react to this call as if the signal
		322	specified by C<$signal> had occured.
		323
		324	=item EV::set_io_collect_interval $time
		325
		326	=item $loop->set_io_collect_interval ($time)
		327
		328	=item EV::set_timeout_collect_interval $time
		329
		330	=item $loop->set_timeout_collect_interval ($time)
		331
		332	These advanced functions set the minimum block interval when polling for I/O events and the minimum
		333	wait interval for timer events. See the libev documentation at
		334	L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#FUNCTIONS_CONTROLLING_THE_EVENT_LOOP>
		335	(locally installed as F<EV::libev>) for a more detailed discussion.
		336
		337	=back
		338
		339
		340	=head1 WATCHER OBJECTS
148		341
149	A watcher is an object that gets created to record your interest in some	342	A watcher is an object that gets created to record your interest in some
150	event. For instance, if you want to wait for STDIN to become readable, you	343	event. For instance, if you want to wait for STDIN to become readable, you
151	would create an EV::io watcher for that:	344	would create an EV::io watcher for that:
152		345
153	my $watcher = EV::io *STDIN, EV::READ, sub {	346	my $watcher = EV::io *STDIN, EV::READ, sub {
154	my ($watcher, $revents) = @_;	347	my ($watcher, $revents) = @_;
155	warn "yeah, STDIN should not be readable without blocking!\n"	348	warn "yeah, STDIN should now be readable without blocking!\n"
156	};	349	};
157		350
158	All watchers can be active (waiting for events) or inactive (paused). Only	351	All watchers can be active (waiting for events) or inactive (paused). Only
159	active watchers will have their callbacks invoked. All callbacks will be	352	active watchers will have their callbacks invoked. All callbacks will be
160	called with at least two arguments: the watcher and a bitmask of received	353	called with at least two arguments: the watcher and a bitmask of received
161	events.	354	events.
162		355
163	Each watcher type has its associated bit in revents, so you can use the	356	Each watcher type has its associated bit in revents, so you can use the
164	same callback for multiple watchers. The event mask is named after the	357	same callback for multiple watchers. The event mask is named after the
165	type, i..e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,	358	type, i.e. EV::child sets EV::CHILD, EV::prepare sets EV::PREPARE,
166	EV::periodic sets EV::PERIODIC and so on, with the exception of IO events	359	EV::periodic sets EV::PERIODIC and so on, with the exception of I/O events
167	(which can set both EV::READ and EV::WRITE bits), and EV::timer (which	360	(which can set both EV::READ and EV::WRITE bits), and EV::timer (which
168	uses EV::TIMEOUT).	361	uses EV::TIMEOUT).
169		362
170	In the rare case where one wants to create a watcher but not start it at	363	In the rare case where one wants to create a watcher but not start it at
171	the same time, each constructor has a variant with a trailing C<_ns> in	364	the same time, each constructor has a variant with a trailing C<_ns> in
…		…
177		370
178	Also, all methods changing some aspect of a watcher (->set, ->priority,	371	Also, all methods changing some aspect of a watcher (->set, ->priority,
179	->fh and so on) automatically stop and start it again if it is active,	372	->fh and so on) automatically stop and start it again if it is active,
180	which means pending events get lost.	373	which means pending events get lost.
181		374
182	=head2 WATCHER TYPES	375	=head2 COMMON WATCHER METHODS
183		376
184	Now lets move to the existing watcher types and asociated methods.	377	This section lists methods common to all watchers.
185
186	The following methods are available for all watchers. Then followes a
187	description of each watcher constructor (EV::io, EV::timer, EV::periodic,
188	EV::signal, EV::child, EV::idle, EV::prepare and EV::check), followed by
189	any type-specific methods (if any).
190		378
191	=over 4	379	=over 4
192		380
193	=item $w->start	381	=item $w->start
194		382
…		…
198		386
199	=item $w->stop	387	=item $w->stop
200		388
201	Stop a watcher if it is active. Also clear any pending events (events that	389	Stop a watcher if it is active. Also clear any pending events (events that
202	have been received but that didn't yet result in a callback invocation),	390	have been received but that didn't yet result in a callback invocation),
203	regardless of wether the watcher was active or not.	391	regardless of whether the watcher was active or not.
204		392
205	=item $bool = $w->is_active	393	=item $bool = $w->is_active
206		394
207	Returns true if the watcher is active, false otherwise.	395	Returns true if the watcher is active, false otherwise.
208		396
…		…
238	The default priority of any newly-created watcher is 0.	426	The default priority of any newly-created watcher is 0.
239		427
240	Note that the priority semantics have not yet been fleshed out and are	428	Note that the priority semantics have not yet been fleshed out and are
241	subject to almost certain change.	429	subject to almost certain change.
242		430
243	=item $w->trigger ($revents)	431	=item $w->invoke ($revents)
244		432
245	Call the callback now with the given event mask.	433	Call the callback now with the given event mask.
		434
		435	=item $w->feed_event ($revents)
		436
		437	Feed some events on this watcher into EV. EV will react to this call as if
		438	the watcher had received the given C<$revents> mask.
		439
		440	=item $revents = $w->clear_pending
		441
		442	If the watcher is pending, this function clears its pending status and
		443	returns its C<$revents> bitset (as if its callback was invoked). If the
		444	watcher isn't pending it does nothing and returns C<0>.
246		445
247	=item $previous_state = $w->keepalive ($bool)	446	=item $previous_state = $w->keepalive ($bool)
248		447
249	Normally, C<EV::loop> will return when there are no active watchers	448	Normally, C<EV::loop> will return when there are no active watchers
250	(which is a "deadlock" because no progress can be made anymore). This is	449	(which is a "deadlock" because no progress can be made anymore). This is
251	convinient because it allows you to start your watchers (and your jobs),	450	convinient because it allows you to start your watchers (and your jobs),
252	call C<EV::loop> once and when it returns you know that all your jobs are	451	call C<EV::loop> once and when it returns you know that all your jobs are
253	finished (or they forgot to register some watchers for their task :).	452	finished (or they forgot to register some watchers for their task :).
254		453
255	Sometimes, however, this gets in your way, for example when you the module	454	Sometimes, however, this gets in your way, for example when the module
256	that calls C<EV::loop> (usually the main program) is not the same module	455	that calls C<EV::loop> (usually the main program) is not the same module
257	as a long-living watcher (for example a DNS client module written by	456	as a long-living watcher (for example a DNS client module written by
258	somebody else even). Then you might want any outstanding requests to be	457	somebody else even). Then you might want any outstanding requests to be
259	handled, but you would not want to keep C<EV::loop> from returning just	458	handled, but you would not want to keep C<EV::loop> from returning just
260	because you happen to have this long-running UDP port watcher.	459	because you happen to have this long-running UDP port watcher.
261		460
262	In this case you can clear the keepalive status, which means that even	461	In this case you can clear the keepalive status, which means that even
263	though your watcher is active, it won't keep C<EV::loop> from returning.	462	though your watcher is active, it won't keep C<EV::loop> from returning.
264		463
265	The initial value for keepalive is true (enabled), and you cna change it	464	The initial value for keepalive is true (enabled), and you can change it
266	any time.	465	any time.
267		466
268	Example: Register an IO watcher for some UDP socket but do not keep the	467	Example: Register an I/O watcher for some UDP socket but do not keep the
269	event loop from running just because of that watcher.	468	event loop from running just because of that watcher.
270		469
271	my $udp_socket = ...	470	my $udp_socket = ...
272	my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... };	471	my $udp_watcher = EV::io $udp_socket, EV::READ, sub { ... };
273	$udp_watcher->keepalive (0);	472	$udp_watcher->keepalive (0);
274		473
		474	=item $loop = $w->loop
		475
		476	Return the loop that this watcher is attached to.
		477
		478	=back
		479
		480
		481	=head1 WATCHER TYPES
		482
		483	Each of the following subsections describes a single watcher type.
		484
		485	=head3 I/O WATCHERS - is this file descriptor readable or writable?
		486
		487	=over 4
		488
275	=item $w = EV::io $fileno_or_fh, $eventmask, $callback	489	=item $w = EV::io $fileno_or_fh, $eventmask, $callback
276		490
277	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback	491	=item $w = EV::io_ns $fileno_or_fh, $eventmask, $callback
278		492
		493	=item $w = $loop->io ($fileno_or_fh, $eventmask, $callback)
		494
		495	=item $w = $loop->io_ns ($fileno_or_fh, $eventmask, $callback)
		496
279	As long as the returned watcher object is alive, call the C<$callback>	497	As long as the returned watcher object is alive, call the C<$callback>
280	when the events specified in C<$eventmask>.	498	when at least one of events specified in C<$eventmask> occurs.
281		499
282	The $eventmask can be one or more of these constants ORed together:	500	The $eventmask can be one or more of these constants ORed together:
283		501
284	EV::READ wait until read() wouldn't block anymore	502	EV::READ wait until read() wouldn't block anymore
285	EV::WRITE wait until write() wouldn't block anymore	503	EV::WRITE wait until write() wouldn't block anymore
…		…
301		519
302	=item $old_eventmask = $w->events ($new_eventmask)	520	=item $old_eventmask = $w->events ($new_eventmask)
303		521
304	Returns the previously set event mask and optionally set a new one.	522	Returns the previously set event mask and optionally set a new one.
305		523
		524	=back
		525
		526
		527	=head3 TIMER WATCHERS - relative and optionally repeating timeouts
		528
		529	=over 4
306		530
307	=item $w = EV::timer $after, $repeat, $callback	531	=item $w = EV::timer $after, $repeat, $callback
308		532
309	=item $w = EV::timer_ns $after, $repeat, $callback	533	=item $w = EV::timer_ns $after, $repeat, $callback
310		534
311	Calls the callback after C<$after> seconds. If C<$repeat> is non-zero,	535	=item $w = $loop->timer ($after, $repeat, $callback)
312	the timer will be restarted (with the $repeat value as $after) after the	536
313	callback returns.	537	=item $w = $loop->timer_ns ($after, $repeat, $callback)
		538
		539	Calls the callback after C<$after> seconds (which may be fractional). If
		540	C<$repeat> is non-zero, the timer will be restarted (with the $repeat
		541	value as $after) after the callback returns.
314		542
315	This means that the callback would be called roughly after C<$after>	543	This means that the callback would be called roughly after C<$after>
316	seconds, and then every C<$repeat> seconds. The timer does his best not	544	seconds, and then every C<$repeat> seconds. The timer does his best not
317	to drift, but it will not invoke the timer more often then once per event	545	to drift, but it will not invoke the timer more often then once per event
318	loop iteration, and might drift in other cases. If that isn't acceptable,	546	loop iteration, and might drift in other cases. If that isn't acceptable,
…		…
324		552
325	The C<timer_ns> variant doesn't start (activate) the newly created watcher.	553	The C<timer_ns> variant doesn't start (activate) the newly created watcher.
326		554
327	=item $w->set ($after, $repeat)	555	=item $w->set ($after, $repeat)
328		556
329	Reconfigures the watcher, see the constructor above for details. Can be at	557	Reconfigures the watcher, see the constructor above for details. Can be called at
330	any time.	558	any time.
331		559
332	=item $w->again	560	=item $w->again
333		561
334	Similar to the C<start> method, but has special semantics for repeating timers:	562	Similar to the C<start> method, but has special semantics for repeating timers:
…		…
345	This behaviour is useful when you have a timeout for some IO	573	This behaviour is useful when you have a timeout for some IO
346	operation. You create a timer object with the same value for C<$after> and	574	operation. You create a timer object with the same value for C<$after> and
347	C<$repeat>, and then, in the read/write watcher, run the C<again> method	575	C<$repeat>, and then, in the read/write watcher, run the C<again> method
348	on the timeout.	576	on the timeout.
349		577
		578	=back
		579
		580
		581	=head3 PERIODIC WATCHERS - to cron or not to cron?
		582
		583	=over 4
350		584
351	=item $w = EV::periodic $at, $interval, $reschedule_cb, $callback	585	=item $w = EV::periodic $at, $interval, $reschedule_cb, $callback
352		586
353	=item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback	587	=item $w = EV::periodic_ns $at, $interval, $reschedule_cb, $callback
		588
		589	=item $w = $loop->periodic ($at, $interval, $reschedule_cb, $callback)
		590
		591	=item $w = $loop->periodic_ns ($at, $interval, $reschedule_cb, $callback)
354		592
355	Similar to EV::timer, but is not based on relative timeouts but on	593	Similar to EV::timer, but is not based on relative timeouts but on
356	absolute times. Apart from creating "simple" timers that trigger "at" the	594	absolute times. Apart from creating "simple" timers that trigger "at" the
357	specified time, it can also be used for non-drifting absolute timers and	595	specified time, it can also be used for non-drifting absolute timers and
358	more complex, cron-like, setups that are not adversely affected by time	596	more complex, cron-like, setups that are not adversely affected by time
…		…
368	This time simply fires at the wallclock time C<$at> and doesn't repeat. It	606	This time simply fires at the wallclock time C<$at> and doesn't repeat. It
369	will not adjust when a time jump occurs, that is, if it is to be run	607	will not adjust when a time jump occurs, that is, if it is to be run
370	at January 1st 2011 then it will run when the system time reaches or	608	at January 1st 2011 then it will run when the system time reaches or
371	surpasses this time.	609	surpasses this time.
372		610
373	=item * non-repeating interval timer ($interval > 0, $reschedule_cb = 0)	611	=item * repeating interval timer ($interval > 0, $reschedule_cb = 0)
374		612
375	In this mode the watcher will always be scheduled to time out at the	613	In this mode the watcher will always be scheduled to time out at the
376	next C<$at + N * $interval> time (for some integer N) and then repeat,	614	next C<$at + N * $interval> time (for some integer N) and then repeat,
377	regardless of any time jumps.	615	regardless of any time jumps.
378		616
…		…
396	time the periodic watcher gets scheduled, the reschedule callback	634	time the periodic watcher gets scheduled, the reschedule callback
397	($reschedule_cb) will be called with the watcher as first, and the current	635	($reschedule_cb) will be called with the watcher as first, and the current
398	time as second argument.	636	time as second argument.
399		637
400	I<This callback MUST NOT stop or destroy this or any other periodic	638	I<This callback MUST NOT stop or destroy this or any other periodic
401	watcher, ever>. If you need to stop it, return 1e30 and stop it	639	watcher, ever, and MUST NOT call any event loop functions or methods>. If
402	afterwards.	640	you need to stop it, return 1e30 and stop it afterwards. You may create
		641	and start a C<EV::prepare> watcher for this task.
403		642
404	It must return the next time to trigger, based on the passed time value	643	It must return the next time to trigger, based on the passed time value
405	(that is, the lowest time value larger than to the second argument). It	644	(that is, the lowest time value larger than or equal to to the second
406	will usually be called just before the callback will be triggered, but	645	argument). It will usually be called just before the callback will be
407	might be called at other times, too.	646	triggered, but might be called at other times, too.
408		647
409	This can be used to create very complex timers, such as a timer that	648	This can be used to create very complex timers, such as a timer that
410	triggers on each midnight, local time (actually 24 hours after the last	649	triggers on each midnight, local time (actually 24 hours after the last
411	midnight, to keep the example simple. If you know a way to do it correctly	650	midnight, to keep the example simple. If you know a way to do it correctly
412	in about the same space (without requiring elaborate modules), drop me a	651	in about the same space (without requiring elaborate modules), drop me a
…		…
426		665
427	The C<periodic_ns> variant doesn't start (activate) the newly created watcher.	666	The C<periodic_ns> variant doesn't start (activate) the newly created watcher.
428		667
429	=item $w->set ($at, $interval, $reschedule_cb)	668	=item $w->set ($at, $interval, $reschedule_cb)
430		669
431	Reconfigures the watcher, see the constructor above for details. Can be at	670	Reconfigures the watcher, see the constructor above for details. Can be called at
432	any time.	671	any time.
433		672
434	=item $w->again	673	=item $w->again
435		674
436	Simply stops and starts the watcher again.	675	Simply stops and starts the watcher again.
437		676
		677	=item $time = $w->at
		678
		679	Return the time that the watcher is expected to trigger next.
		680
		681	=back
		682
		683
		684	=head3 SIGNAL WATCHERS - signal me when a signal gets signalled!
		685
		686	=over 4
438		687
439	=item $w = EV::signal $signal, $callback	688	=item $w = EV::signal $signal, $callback
440		689
441	=item $w = EV::signal_ns $signal, $callback	690	=item $w = EV::signal_ns $signal, $callback
442		691
443	Call the callback when $signal is received (the signal can be specified	692	Call the callback when $signal is received (the signal can be specified by
444	by number or by name, just as with kill or %SIG).	693	number or by name, just as with C<kill> or C<%SIG>).
445		694
446	EV will grab the signal for the process (the kernel only allows one	695	EV will grab the signal for the process (the kernel only allows one
447	component to receive a signal at a time) when you start a signal watcher,	696	component to receive a signal at a time) when you start a signal watcher,
448	and removes it again when you stop it. Perl does the same when you	697	and removes it again when you stop it. Perl does the same when you
449	add/remove callbacks to %SIG, so watch out.	698	add/remove callbacks to C<%SIG>, so watch out.
450		699
451	You can have as many signal watchers per signal as you want.	700	You can have as many signal watchers per signal as you want.
452		701
453	The C<signal_ns> variant doesn't start (activate) the newly created watcher.	702	The C<signal_ns> variant doesn't start (activate) the newly created watcher.
454		703
455	=item $w->set ($signal)	704	=item $w->set ($signal)
456		705
457	Reconfigures the watcher, see the constructor above for details. Can be at	706	Reconfigures the watcher, see the constructor above for details. Can be
458	any time.	707	called at any time.
459		708
460	=item $current_signum = $w->signal	709	=item $current_signum = $w->signal
461		710
462	=item $old_signum = $w->signal ($new_signal)	711	=item $old_signum = $w->signal ($new_signal)
463		712
464	Returns the previously set signal (always as a number not name) and	713	Returns the previously set signal (always as a number not name) and
465	optionally set a new one.	714	optionally set a new one.
466		715
		716	=back
467		717
		718
		719	=head3 CHILD WATCHERS - watch out for process status changes
		720
		721	=over 4
		722
468	=item $w = EV::child $pid, $callback	723	=item $w = EV::child $pid, $trace, $callback
469		724
470	=item $w = EV::child_ns $pid, $callback	725	=item $w = EV::child_ns $pid, $trace, $callback
		726
		727	=item $w = $loop->child ($pid, $trace, $callback)
		728
		729	=item $w = $loop->child_ns ($pid, $trace, $callback)
471		730
472	Call the callback when a status change for pid C<$pid> (or any pid	731	Call the callback when a status change for pid C<$pid> (or any pid
473	if C<$pid> is 0) has been received. More precisely: when the process	732	if C<$pid> is 0) has been received (a status change happens when the
		733	process terminates or is killed, or, when trace is true, additionally when
		734	it is stopped or continued). More precisely: when the process receives
474	receives a SIGCHLD, EV will fetch the outstanding exit/wait status for all	735	a C<SIGCHLD>, EV will fetch the outstanding exit/wait status for all
475	changed/zombie children and call the callback.	736	changed/zombie children and call the callback.
476		737
477	You can access both status and pid by using the C<rstatus> and C<rpid>	738	It is valid (and fully supported) to install a child watcher after a child
478	methods on the watcher object.	739	has exited but before the event loop has started its next iteration (for
		740	example, first you C<fork>, then the new child process might exit, and
		741	only then do you install a child watcher in the parent for the new pid).
479		742
		743	You can access both exit (or tracing) status and pid by using the
		744	C<rstatus> and C<rpid> methods on the watcher object.
		745
480	You can have as many pid watchers per pid as you want.	746	You can have as many pid watchers per pid as you want, they will all be
		747	called.
481		748
482	The C<child_ns> variant doesn't start (activate) the newly created watcher.	749	The C<child_ns> variant doesn't start (activate) the newly created watcher.
483		750
484	=item $w->set ($pid)	751	=item $w->set ($pid, $trace)
485		752
486	Reconfigures the watcher, see the constructor above for details. Can be at	753	Reconfigures the watcher, see the constructor above for details. Can be called at
487	any time.	754	any time.
488		755
489	=item $current_pid = $w->pid	756	=item $current_pid = $w->pid
490
491	=item $old_pid = $w->pid ($new_pid)
492		757
493	Returns the previously set process id and optionally set a new one.	758	Returns the previously set process id and optionally set a new one.
494		759
495	=item $exit_status = $w->rstatus	760	=item $exit_status = $w->rstatus
496		761
…		…
500	=item $pid = $w->rpid	765	=item $pid = $w->rpid
501		766
502	Return the pid of the awaited child (useful when you have installed a	767	Return the pid of the awaited child (useful when you have installed a
503	watcher for all pids).	768	watcher for all pids).
504		769
		770	=back
		771
		772
		773	=head3 STAT WATCHERS - did the file attributes just change?
		774
		775	=over 4
		776
		777	=item $w = EV::stat $path, $interval, $callback
		778
		779	=item $w = EV::stat_ns $path, $interval, $callback
		780
		781	=item $w = $loop->stat ($path, $interval, $callback)
		782
		783	=item $w = $loop->stat_ns ($path, $interval, $callback)
		784
		785	Call the callback when a file status change has been detected on
		786	C<$path>. The C<$path> does not need to exist, changing from "path exists"
		787	to "path does not exist" is a status change like any other.
		788
		789	The C<$interval> is a recommended polling interval for systems where
		790	OS-supported change notifications don't exist or are not supported. If
		791	you use C<0> then an unspecified default is used (which is highly
		792	recommended!), which is to be expected to be around five seconds usually.
		793
		794	This watcher type is not meant for massive numbers of stat watchers,
		795	as even with OS-supported change notifications, this can be
		796	resource-intensive.
		797
		798	The C<stat_ns> variant doesn't start (activate) the newly created watcher.
		799
		800	=item ... = $w->stat
		801
		802	This call is very similar to the perl C<stat> built-in: It stats (using
		803	C<lstat>) the path specified in the watcher and sets perls stat cache (as
		804	well as EV's idea of the current stat values) to the values found.
		805
		806	In scalar context, a boolean is return indicating success or failure of
		807	the stat. In list context, the same 13-value list as with stat is returned
		808	(except that the blksize and blocks fields are not reliable).
		809
		810	In the case of an error, errno is set to C<ENOENT> (regardless of the
		811	actual error value) and the C<nlink> value is forced to zero (if the stat
		812	was successful then nlink is guaranteed to be non-zero).
		813
		814	See also the next two entries for more info.
		815
		816	=item ... = $w->attr
		817
		818	Just like C<< $w->stat >>, but without the initial stat'ing: this returns
		819	the values most recently detected by EV. See the next entry for more info.
		820
		821	=item ... = $w->prev
		822
		823	Just like C<< $w->stat >>, but without the initial stat'ing: this returns
		824	the previous set of values, before the change.
		825
		826	That is, when the watcher callback is invoked, C<< $w->prev >> will be set
		827	to the values found I<before> a change was detected, while C<< $w->attr >>
		828	returns the values found leading to the change detection. The difference (if any)
		829	between C<prev> and C<attr> is what triggered the callback.
		830
		831	If you did something to the filesystem object and do not want to trigger
		832	yet another change, you can call C<stat> to update EV's idea of what the
		833	current attributes are.
		834
		835	=item $w->set ($path, $interval)
		836
		837	Reconfigures the watcher, see the constructor above for details. Can be
		838	called at any time.
		839
		840	=item $current_path = $w->path
		841
		842	=item $old_path = $w->path ($new_path)
		843
		844	Returns the previously set path and optionally set a new one.
		845
		846	=item $current_interval = $w->interval
		847
		848	=item $old_interval = $w->interval ($new_interval)
		849
		850	Returns the previously set interval and optionally set a new one. Can be
		851	used to query the actual interval used.
		852
		853	=back
		854
		855
		856	=head3 IDLE WATCHERS - when you've got nothing better to do...
		857
		858	=over 4
505		859
506	=item $w = EV::idle $callback	860	=item $w = EV::idle $callback
507		861
508	=item $w = EV::idle_ns $callback	862	=item $w = EV::idle_ns $callback
509		863
510	Call the callback when there are no pending io, timer/periodic, signal or	864	=item $w = $loop->idle ($callback)
511	child events, i.e. when the process is idle.	865
		866	=item $w = $loop->idle_ns ($callback)
		867
		868	Call the callback when there are no other pending watchers of the same or
		869	higher priority (excluding check, prepare and other idle watchers of the
		870	same or lower priority, of course). They are called idle watchers because
		871	when the watcher is the highest priority pending event in the process, the
		872	process is considered to be idle at that priority.
		873
		874	If you want a watcher that is only ever called when I<no> other events are
		875	outstanding you have to set the priority to C<EV::MINPRI>.
512		876
513	The process will not block as long as any idle watchers are active, and	877	The process will not block as long as any idle watchers are active, and
514	they will be called repeatedly until stopped.	878	they will be called repeatedly until stopped.
515		879
		880	For example, if you have idle watchers at priority C<0> and C<1>, and
		881	an I/O watcher at priority C<0>, then the idle watcher at priority C<1>
		882	and the I/O watcher will always run when ready. Only when the idle watcher
		883	at priority C<1> is stopped and the I/O watcher at priority C<0> is not
		884	pending with the C<0>-priority idle watcher be invoked.
		885
516	The C<idle_ns> variant doesn't start (activate) the newly created watcher.	886	The C<idle_ns> variant doesn't start (activate) the newly created watcher.
517		887
		888	=back
		889
		890
		891	=head3 PREPARE WATCHERS - customise your event loop!
		892
		893	=over 4
518		894
519	=item $w = EV::prepare $callback	895	=item $w = EV::prepare $callback
520		896
521	=item $w = EV::prepare_ns $callback	897	=item $w = EV::prepare_ns $callback
		898
		899	=item $w = $loop->prepare ($callback)
		900
		901	=item $w = $loop->prepare_ns ($callback)
522		902
523	Call the callback just before the process would block. You can still	903	Call the callback just before the process would block. You can still
524	create/modify any watchers at this point.	904	create/modify any watchers at this point.
525		905
526	See the EV::check watcher, below, for explanations and an example.	906	See the EV::check watcher, below, for explanations and an example.
527		907
528	The C<prepare_ns> variant doesn't start (activate) the newly created watcher.	908	The C<prepare_ns> variant doesn't start (activate) the newly created watcher.
529		909
		910	=back
		911
		912
		913	=head3 CHECK WATCHERS - customise your event loop even more!
		914
		915	=over 4
530		916
531	=item $w = EV::check $callback	917	=item $w = EV::check $callback
532		918
533	=item $w = EV::check_ns $callback	919	=item $w = EV::check_ns $callback
		920
		921	=item $w = $loop->check ($callback)
		922
		923	=item $w = $loop->check_ns ($callback)
534		924
535	Call the callback just after the process wakes up again (after it has	925	Call the callback just after the process wakes up again (after it has
536	gathered events), but before any other callbacks have been invoked.	926	gathered events), but before any other callbacks have been invoked.
537		927
538	This is used to integrate other event-based software into the EV	928	This is used to integrate other event-based software into the EV
…		…
548	or return;	938	or return;
549		939
550	# make the dispatcher handle any outstanding stuff	940	# make the dispatcher handle any outstanding stuff
551	... not shown	941	... not shown
552		942
553	# create an IO watcher for each and every socket	943	# create an I/O watcher for each and every socket
554	@snmp_watcher = (	944	@snmp_watcher = (
555	(map { EV::io $_, EV::READ, sub { } }	945	(map { EV::io $_, EV::READ, sub { } }
556	keys %{ $dispatcher->{_descriptors} }),	946	keys %{ $dispatcher->{_descriptors} }),
557		947
558	EV::timer +($event->[Net::SNMP::Dispatcher::_ACTIVE]	948	EV::timer +($event->[Net::SNMP::Dispatcher::_ACTIVE]
…		…
573	# make the dispatcher handle any new stuff	963	# make the dispatcher handle any new stuff
574	... not shown	964	... not shown
575	};	965	};
576		966
577	The callbacks of the created watchers will not be called as the watchers	967	The callbacks of the created watchers will not be called as the watchers
578	are destroyed before this cna happen (remember EV::check gets called	968	are destroyed before this can happen (remember EV::check gets called
579	first).	969	first).
580		970
581	The C<check_ns> variant doesn't start (activate) the newly created watcher.	971	The C<check_ns> variant doesn't start (activate) the newly created watcher.
582		972
583	=back	973	=back
		974
		975
		976	=head3 FORK WATCHERS - the audacity to resume the event loop after a fork
		977
		978	Fork watchers are called when a C<fork ()> was detected. The invocation
		979	is done before the event loop blocks next and before C<check> watchers
		980	are being called, and only in the child after the fork.
		981
		982	=over 4
		983
		984	=item $w = EV::fork $callback
		985
		986	=item $w = EV::fork_ns $callback
		987
		988	=item $w = $loop->fork ($callback)
		989
		990	=item $w = $loop->fork_ns ($callback)
		991
		992	Call the callback before the event loop is resumed in the child process
		993	after a fork.
		994
		995	The C<fork_ns> variant doesn't start (activate) the newly created watcher.
		996
		997	=back
		998
		999
		1000	=head3 EMBED WATCHERS - when one backend isn't enough...
		1001
		1002	This is a rather advanced watcher type that lets you embed one event loop
		1003	into another (currently only IO events are supported in the embedded
		1004	loop, other types of watchers might be handled in a delayed or incorrect
		1005	fashion and must not be used).
		1006
		1007	See the libev documentation at
		1008	L<http://pod.tst.eu/http://cvs.schmorp.de/libev/ev.pod#code_ev_embed_code_when_one_backend_>
		1009	(locally installed as F<EV::libev>) for more details.
		1010
		1011	In short, this watcher is most useful on BSD systems without working
		1012	kqueue to still be able to handle a large number of sockets:
		1013
		1014	my $socket_loop;
		1015
		1016	# check wether we use SELECT or POLL _and_ KQUEUE is supported
		1017	if (
		1018	(EV::backend & (EV::BACKEND_POLL \| EV::BACKEND_SELECT))
		1019	&& (EV::supported_backends & EV::embeddable_backends & EV::BACKEND_KQUEUE)
		1020	) {
		1021	# use kqueue for sockets
		1022	$socket_loop = new EV::Loop EV::BACKEND_KQUEUE \| EV::FLAG_NOENV;
		1023	}
		1024
		1025	# use the default loop otherwise
		1026	$socket_loop \|\|= EV::default_loop;
		1027
		1028	=over 4
		1029
		1030	=item $w = EV::embed $otherloop[, $callback]
		1031
		1032	=item $w = EV::embed_ns $otherloop[, $callback]
		1033
		1034	=item $w = $loop->embed ($otherloop[, $callback])
		1035
		1036	=item $w = $loop->embed_ns ($otherloop[, $callback])
		1037
		1038	Call the callback when the embedded event loop (C<$otherloop>) has any
		1039	I/O activity. The C<$callback> is optional: if it is missing, then the
		1040	embedded event loop will be managed automatically (which is recommended),
		1041	otherwise you have to invoke C<sweep> yourself.
		1042
		1043	The C<embed_ns> variant doesn't start (activate) the newly created watcher.
		1044
		1045	=back
		1046
		1047	=head3 ASYNC WATCHERS - how to wake up another event loop
		1048
		1049	Async watchers are provided by EV, but have little use in perl directly, as perl
		1050	neither supports threads nor direct access to signal handlers or other
		1051	contexts where they could be of value.
		1052
		1053	It is, however, possible to use them from the XS level.
		1054
		1055	Please see the libev documentation for further details.
		1056
		1057	=over 4
		1058
		1059	=item $w = EV::async $callback
		1060
		1061	=item $w = EV::async_ns $callback
		1062
		1063	=item $w->send
		1064
		1065	=item $bool = $w->async_pending
		1066
		1067	=back
		1068
		1069
		1070	=head1 PERL SIGNALS
		1071
		1072	While Perl signal handling (C<%SIG>) is not affected by EV, the behaviour
		1073	with EV is as the same as any other C library: Perl-signals will only be
		1074	handled when Perl runs, which means your signal handler might be invoked
		1075	only the next time an event callback is invoked.
		1076
		1077	The solution is to use EV signal watchers (see C<EV::signal>), which will
		1078	ensure proper operations with regards to other event watchers.
		1079
		1080	If you cannot do this for whatever reason, you can also force a watcher
		1081	to be called on every event loop iteration by installing a C<EV::check>
		1082	watcher:
		1083
		1084	my $async_check = EV::check sub { };
		1085
		1086	This ensures that perl gets into control for a short time to handle any
		1087	pending signals, and also ensures (slightly) slower overall operation.
584		1088
585	=head1 THREADS	1089	=head1 THREADS
586		1090
587	Threads are not supported by this module in any way. Perl pseudo-threads	1091	Threads are not supported by this module in any way. Perl pseudo-threads
588	is evil stuff and must die. As soon as Perl gains real threads I will work	1092	is evil stuff and must die. As soon as Perl gains real threads I will work
…		…
610	our $DIED = sub {	1114	our $DIED = sub {
611	warn "EV: error in callback (ignoring): $@";	1115	warn "EV: error in callback (ignoring): $@";
612	};	1116	};
613		1117
614	default_loop	1118	default_loop
615	or die 'EV: cannot initialise libev backend. bad $ENV{LIBEV_METHODS}?';	1119	or die 'EV: cannot initialise libev backend. bad $ENV{LIBEV_FLAGS}?';
616		1120
617	1;	1121	1;
618		1122
619	=head1 SEE ALSO	1123	=head1 SEE ALSO
620		1124
621	L<EV::DNS>.	1125	L<EV::ADNS> (asynchronous DNS), L<Glib::EV> (makes Glib/Gtk2 use EV as
		1126	event loop), L<EV::Glib> (embed Glib into EV), L<Coro::EV> (efficient
		1127	coroutines with EV), L<Net::SNMP::EV> (asynchronous SNMP), L<AnyEvent> for
		1128	event-loop agnostic and portable event driven programming.
622		1129
623	=head1 AUTHOR	1130	=head1 AUTHOR
624		1131
625	Marc Lehmann <schmorp@schmorp.de>	1132	Marc Lehmann <schmorp@schmorp.de>
626	http://home.schmorp.de/	1133	http://home.schmorp.de/
627		1134
628	=cut	1135	=cut
629		1136

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Comparing EV/EV.pm (file contents): Revision 1.50 by root, Sat Nov 24 08:42:38 2007 UTC vs. Revision 1.115 by root, Tue Apr 28 00:50:56 2009 UTC

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Comparing EV/EV.pm (file contents):
Revision 1.50 by root, Sat Nov 24 08:42:38 2007 UTC vs.
Revision 1.115 by root, Tue Apr 28 00:50:56 2009 UTC